title: Direct from polyacrylamide gel infrared laser desorption/ionization.
mesh_terms: D000818:Animals; D001920:Bradykinin / Q000032:analysis* / Q000737:chemistry; D002417:Cattle; D004591:Electrophoresis, Polyacrylamide Gel / Q000379:methods*; D007259:Infrared Rays; D007328:Insulin / Q000032:analysis* / Q000737:chemistry; D007834:Lasers; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
chemical_list: D007328:Insulin; D001920:Bradykinin